Skipping IOI to LOI

Does anyone have any advice or experience trying to skip a broker enforced IOI process? We have high conviction on a deal and enough information leveraging a CIM, sell-side QoE, and several industry calls to submit a thorough LOI, but the broker continues to push for an IOI. I understand they want optionality and to shop the terms, but just curious whether anyone with experience in best practices on "pre-empting" the deal. Do we just submit an executed LOI with a deadline and see what happens?